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Tamura, Kazuhisa; Seno, Ryu; Sakaue, Kiyoshi*; Nishihata, Yasuo; Mizuki, Junichiro
no journal, ,
The surface structure of Au(111) electrodes in hydrophobic ionic liquids, 1-Butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide ([BMP]TFSA) and 1-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ([BMIM]TFSA) was investigated using surface X-ray scattering. In both [BMP]TFSA and [BMIM]TFSA, the reconstruction of the surface structure was observed and the phase transition between the (1 X 1) and the reconstructed structure was found to be reversible. On the other hand, the area of the reconstructed structure in [BMP]TFSA was larger than that in [BMIM]TFSA. These differences suggest that the [BMIM]+-Au interaction is stronger than the [BMP]+-Au interaction.
Seno, Ryu; Tamura, Kazuhisa; Nishihata, Yasuo; Mizuki, Junichiro; Sakaue, Kiyoshi*
no journal, ,
The electrodeposited Bi/Au(111) surface structure in 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([BMIM]TFSA) was investigated using surface X-ray scattering (SXS). The X-ray reflectivity analysis showed that the distance between the electrodeposited Bi layer and the most outer Au surface layer was 2.47 
and it agreed that Bi atoms deposited on the threefold hollow site of Au(111) surface. Further, the distance between the electrodeposited Bi layers was 2.51 and it also agreed that Bi atoms deposited on the threefold hollow site of the Bi layer. The amount of electrodeposited Bi on Au(111) surface was 0.85 monolayer; thus, it was suggested that the electrodeposited Bi formed epitaxial layer on Au(111) surface in [BMIM]TFSA.